LoRa系统对地面电视广播系统的干扰研究  

Study on interference from LoRa system to terrestrial television broadcasting system

作　　者：侯然然 李景春 许颖[2] 伉沛川[2] HOU Ranran;LI Jingchun;XU Ying;KANG Peichuan(School of Electronic and Information Engineering,Hebei University of Technology,Tianjin 300401,China;The State Radio Monitoring Center,Beijing 100037,China)

机构地区：[1]河北工业大学电子信息工程学院,天津300401 [2]国家无线电监测中心,北京100037

出　　处：《现代电子技术》2021年第7期17-21,共5页Modern Electronics Technique

基　　金：国家科技重大专项:面向WRC-19的5G重点频谱利用技术研究与验证(2018ZX03001025)。

摘　　要：针对LoRa技术在我国470~510 MHz频段的投入使用,对我国地面电视广播系统的干扰问题开展了研究。依据我国出台的广播电视业务的标准与无线电通信会议大会发布的相关建议书,采用理论分析和仿真计算手段,分析研究城区和郊区场景下LoRa系统对我国地面电视广播系统的干扰问题。结果显示,LoRa系统与地面电视广播系统同频部署时,对地面电视广播系统干扰严重。最后给出了在该频段上部署LoRa系统的建议及减小干扰的措施,为LoRa系统对地面电视广播系统的干扰提供了参考。The influence of LoRa(long-range)technology used in 470~510 MHz frequency band on terrestrial television broadcasting systems in China is studied in this paper.According to the television broadcasting business standards issued by China and the related recommendations issued by ITU-R,the interference from LoRa system to China′s terrestrial television broadcasting systems in the scenes of the urban areas and their suburbs is analyzed and discussed by theoretical analysis and simulation calculation.The results show that the LoRa system will have a serious interference on the terrestrial television broadcasting system when it is deployed at the same band with the terrestrial television broadcasting system.Finally,the suggestions of deploying LoRa system in this frequency band and the measures to reduce the interference are given,which provides a reference for the interference from LoRa system to the terrestrial television broadcasting system.

关 键 词：LoRa技术 电视广播系统 触发场强 确定性分析 470~510 MHz频段 干扰研究 降干扰措施 

分 类 号：TN925-34[电子电信—通信与信息系统]